Comparison

RF Engineer Toolkit vs Coil 32

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

RF Engineer Toolkit

This app provides a comprehensive suite of 45 RF and antenna calculators for engineers and technicians. It offers unit-tested formulas for field, site, and lab calculations, including RF exposure and impedance matching. A free version offers 16 calculators, with Pro unlocking all features and advanced options.

Highlights
  • 45 RF and antenna calculators
  • Unit-tested formulas against industry standards
  • Field and site calculations (VSWR, link budget, RF exposure)
  • Design and lab calculations (Smith chart, impedance matching, filters)
  • Everyday RF conversions (dBm, W, V)
  • Free version with 16 calculators
  • Pro version with full access and advanced features
Features
Read full description

RF Engineer Toolkit is the calculator set RF engineers, tower and DAS technicians, PCB designers, and radio amateurs reach for every day. 45 calculators, every formula unit-tested against Pozar, Balanis, ICNIRP 2020, FCC OET-65, and manufacturer cable data — with live results, locale-aware input, and no ads. FIELD AND SITE • VSWR, return loss, reflection coefficient, and mismatch loss from any one value or a wattmeter reading. • Cable loss with manufacturer coefficients (LMR, RG, Heliax, 9913), SWR loss, and ERP. • Link budget with FSPL, cable losses, gains, sensitivity, and margin. • Antenna downtilt and coverage, radio horizon, Fresnel zone with earth bulge and clearance. • RF exposure against FCC and ICNIRP limits, with safe distance for public and occupational exposure. • Antenna separation and co-site isolation, including required spacing. • Dipole, helical, and parabolic dish design, near-field boundaries, and Doppler shift. DESIGN AND LAB • Smith chart with series and shunt elements, lines and stubs, exportable as an image. • Impedance matching networks (L, Pi, T) with Q and bandwidth. • Attenuators (Pi, Tee, bridged-T, L-pad) with E24 and E96 values and real achieved attenuation. • LC filter designer: Butterworth and Chebyshev, low-pass, high-pass, band-pass, and band-stop. • Receiver chain: cascaded gain, noise figure, IP3, noise floor, and SFDR. • Amplifier linearity: P1dB, IP3, back-off, IM3, and PAE. • Microstrip, stripline, coplanar, and differential-pair impedance with synthesis and substrate presets. • Coax impedance, cable delay and phase, quarter-wave transformers, and skin depth. • Power dividers and directional couplers, S-parameter conversion, and intermodulation products. • Rectangular and circular waveguides with WR tables, cutoff, and guide wavelength. EVERYDAY CALCULATORS • dBm, dBW, W, V, dBV, dBµV, dBu, and dBi/dBd conversion. • Wavelength, reactance, resonance, time constants, Ohm's law, dividers, series and parallel circuits. FREE AND PRO 16 calculators are free, and every Pro calculator can be previewed. RF Toolkit Pro unlocks: • All 45 RF calculators. • Searchable calculation history with saved inputs. • PDF exports of calculation result sheets. • Custom cable and substrate libraries. Choose the plan that works for you: • Yearly subscription with a 7-day free trial. • Monthly subscription. • One-time lifetime purchase. Subscriptions renew automatically unless cancelled at least 24 hours before the current period ends. You can manage subscriptions in your Apple Account settings. PRIVACY No accounts. No analytics. No ads. No tracking. Your calculation history stays on your device. Privacy Policy: https://zhsystems.me/privacy-rf-engineer-toolkit-privacy-policy-terms-of-use/ Terms of Use: https://zhsystems.me/turms-rf-engineer-toolkit-terms-of-use/

About

Coil 32

Calculate inductance for various coil types, including air core, ferrite toroid, and PCB flat square coils. Determine the number of turns needed or verify existing inductance values. Ideal for electronics enthusiasts and builders.

Highlights
  • Single-layer air core inductor calculation
  • Multi-layer air core inductor calculation
  • Ferrite toroid coil calculation
  • PCB flat square coil calculation
  • Choke inductance calculation
  • Calculate required turns
  • Verify existing inductance
Features
Read full description

This app helps you easily calculate inductance for different types of coils, including single-layer and multi-layer air core inductors, ferrite toroid coils, PCB flat square coils, and chokes. Whether you need to find the required number of turns for a custom coil or check the inductance of an existing one, this tool is designed to make the process simple and accurate. Perfect for HAM operators, audiophiles, and electronics hobbyists who enjoy building their own components. In-app purchase Details: Lifetime Access for ads free version Privacy Policy : https://applicationcontent.wordpress.com/privacy-policy/ Terms of use : https://applicationcontent.wordpress.com/terms-of-use/

Screenshots

RF Engineer Toolkit4 screens
Coil 324 screens

Verdict

The call

The clearest difference is rating: RF Engineer Toolkit at 5.0 against Coil 32's 1.0. Coil 32's advantage is iOS requirement (12.0 vs 17.6). On price, ratings volume, ads and in-app purchases there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. RF Engineer Toolkit sells 3 in-app purchases, starting at $0.99 per month and Coil 32 sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

RF Engineer Toolkit holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Scorecard2 real differences · 8 level
RF Engineer Toolkit versus Coil 32: the parameters behind the verdict, then further details
ParameterRF Engineer ToolkitCoil 32
PriceFreeFree
Rating5.0 (1 ratings) — better1.0 (1 ratings)
Positive reviews0.0% of reviews—
Number of ratings11
Update frequencyEvery 2 months—
AdsNoNo
In-app purchasesYesYes
MonetizationFreemiumFree with in-app purchases
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.612.0 — better
Further details — not scored
Size12 MB72 MB
Age rating4+4+
DeveloperVladislav ZhirnovAshvin Kevadiya

Customer experience

RF Engineer Toolkit

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Coil 32

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

3 purchases

RF Engineer Toolkit

Subscriptions2
  • Full version / monthly$0.991 Month
  • Full version / year$4.991 Year
One-time1
  • Remove ADS$9.99
1 purchases

Coil 32

One-time1
  • Lifetime Premium$9.99

Questions

Is RF Engineer Toolkit free?
RF Engineer Toolkit is free to download, with in-app purchases available.
Is Coil 32 free?
Coil 32 is free to download, with in-app purchases available.
Which has better reviews, RF Engineer Toolkit or Coil 32?
RF Engineer Toolkit is rated higher. RF Engineer Toolkit averages 5.0 out of 5 from 1 ratings, while Coil 32 averages 1.0 from 1 ratings.
Do RF Engineer Toolkit or Coil 32 have ads?
Neither RF Engineer Toolkit nor Coil 32 shows ads.

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